The American Journal of Medicine (2006) 119, 198-202 Aspirin to Prevent Heart Attack and Stroke: What’s the Right Dose? James E. Dalen, MD, MPH Professor Emeritus, University of Arizona, Tucson ABSTRACT Despite hundreds of clinical trials, the appropriate dose of aspirin to prevent myocardial infarction (MI)and stroke is uncertain. In the US, the doses most frequently recommended ar